Li FI

Li-Fi has been experimented with for the last few years and has some interesting potential for uber-fast data transfer speeds. Li-Fi uses light to transmit data rather than Wi-Fi radio waves. This technology is theoretically capable of transmitting data at much higher speeds and is also less prone to interference. 

Because the visible light spectrum is around 10,000 times larger than the radio spectrum, there's a lot more potential for bandwidth. It's also thought that if Li-Fi does manage to take off it will be considerably cheaper than Wi-Fi.